drivers/bluetooth/ath3k.c

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/device.h>
  28 #include <linux/firmware.h>
  29 #include <linux/usb.h>
  30 #include <asm/unaligned.h>
  31 #include <net/bluetooth/bluetooth.h>
  32
  33 #define VERSION "1.0"
  34 #define ATH3K_FIRMWARE  "ath3k-1.fw"
  35
  36 #define ATH3K_DNLOAD                            0x01
  37 #define ATH3K_GETSTATE                          0x05
  38 #define ATH3K_SET_NORMAL_MODE                   0x07
  39 #define ATH3K_GETVERSION                        0x09
  40 #define USB_REG_SWITCH_VID_PID                  0x0a
  41
  42 #define ATH3K_MODE_MASK                         0x3F
  43 #define ATH3K_NORMAL_MODE                       0x0E
  44
  45 #define ATH3K_PATCH_UPDATE                      0x80
  46 #define ATH3K_SYSCFG_UPDATE                     0x40
  47
  48 #define ATH3K_XTAL_FREQ_26M                     0x00
  49 #define ATH3K_XTAL_FREQ_40M                     0x01
  50 #define ATH3K_XTAL_FREQ_19P2                    0x02
  51 #define ATH3K_NAME_LEN                          0xFF
  52
  53 struct ath3k_version {
  54         __le32  rom_version;
  55         __le32  build_version;
  56         __le32  ram_version;
  57         __u8    ref_clock;
  58         __u8    reserved[7];
  59 } __packed;
  60
  61 static const struct usb_device_id ath3k_table[] = {
  62         /* Atheros AR3011 */
  63         { USB_DEVICE(0x0CF3, 0x3000) },
  64
  65         /* Atheros AR3011 with sflash firmware*/
  66         { USB_DEVICE(0x0489, 0xE027) },
  67         { USB_DEVICE(0x0489, 0xE03D) },
  68         { USB_DEVICE(0x04F2, 0xAFF1) },
  69         { USB_DEVICE(0x0930, 0x0215) },
  70         { USB_DEVICE(0x0CF3, 0x3002) },
  71         { USB_DEVICE(0x0CF3, 0xE019) },
  72         { USB_DEVICE(0x13d3, 0x3304) },
  73
  74         /* Atheros AR9285 Malbec with sflash firmware */
  75         { USB_DEVICE(0x03F0, 0x311D) },
  76
  77         /* Atheros AR3012 with sflash firmware*/
  78         { USB_DEVICE(0x0489, 0xe04d) },
  79         { USB_DEVICE(0x0489, 0xe04e) },
  80         { USB_DEVICE(0x0489, 0xe057) },
  81         { USB_DEVICE(0x0489, 0xe056) },
  82         { USB_DEVICE(0x0489, 0xe05f) },
  83         { USB_DEVICE(0x0489, 0xe076) },
  84         { USB_DEVICE(0x0489, 0xe078) },
  85         { USB_DEVICE(0x0489, 0xe095) },
  86         { USB_DEVICE(0x04c5, 0x1330) },
  87         { USB_DEVICE(0x04CA, 0x3004) },
  88         { USB_DEVICE(0x04CA, 0x3005) },
  89         { USB_DEVICE(0x04CA, 0x3006) },
  90         { USB_DEVICE(0x04CA, 0x3007) },
  91         { USB_DEVICE(0x04CA, 0x3008) },
  92         { USB_DEVICE(0x04CA, 0x300b) },
  93         { USB_DEVICE(0x04CA, 0x300d) },
  94         { USB_DEVICE(0x04CA, 0x300f) },
  95         { USB_DEVICE(0x04CA, 0x3010) },
  96         { USB_DEVICE(0x04CA, 0x3014) },
  97         { USB_DEVICE(0x0930, 0x0219) },
  98         { USB_DEVICE(0x0930, 0x021c) },
  99         { USB_DEVICE(0x0930, 0x0220) },
 100         { USB_DEVICE(0x0930, 0x0227) },
 101         { USB_DEVICE(0x0b05, 0x17d0) },
 102         { USB_DEVICE(0x0CF3, 0x0036) },
 103         { USB_DEVICE(0x0CF3, 0x3004) },
 104         { USB_DEVICE(0x0CF3, 0x3008) },
 105         { USB_DEVICE(0x0CF3, 0x311D) },
 106         { USB_DEVICE(0x0CF3, 0x311E) },
 107         { USB_DEVICE(0x0CF3, 0x311F) },
 108         { USB_DEVICE(0x0cf3, 0x3121) },
 109         { USB_DEVICE(0x0CF3, 0x817a) },
 110         { USB_DEVICE(0x0CF3, 0x817b) },
 111         { USB_DEVICE(0x0cf3, 0xe003) },
 112         { USB_DEVICE(0x0CF3, 0xE004) },
 113         { USB_DEVICE(0x0CF3, 0xE005) },
 114         { USB_DEVICE(0x0CF3, 0xE006) },
 115         { USB_DEVICE(0x13d3, 0x3362) },
 116         { USB_DEVICE(0x13d3, 0x3375) },
 117         { USB_DEVICE(0x13d3, 0x3393) },
 118         { USB_DEVICE(0x13d3, 0x3395) },
 119         { USB_DEVICE(0x13d3, 0x3402) },
 120         { USB_DEVICE(0x13d3, 0x3408) },
 121         { USB_DEVICE(0x13d3, 0x3423) },
 122         { USB_DEVICE(0x13d3, 0x3432) },
 123         { USB_DEVICE(0x13d3, 0x3472) },
 124         { USB_DEVICE(0x13d3, 0x3474) },
 125
 126         /* Atheros AR5BBU12 with sflash firmware */
 127         { USB_DEVICE(0x0489, 0xE02C) },
 128
 129         /* Atheros AR5BBU22 with sflash firmware */
 130         { USB_DEVICE(0x0489, 0xE036) },
 131         { USB_DEVICE(0x0489, 0xE03C) },
 132
 133         { }     /* Terminating entry */
 134 };
 135
 136 MODULE_DEVICE_TABLE(usb, ath3k_table);
 137
 138 #define BTUSB_ATH3012           0x80
 139 /* This table is to load patch and sysconfig files
 140  * for AR3012 */
 141 static const struct usb_device_id ath3k_blist_tbl[] = {
 142
 143         /* Atheros AR3012 with sflash firmware*/
 144         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 145         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 146         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 147         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 148         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 149         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 150         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 151         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 152         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 153         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 154         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 155         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 156         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 157         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 158         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 159         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 160         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 161         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
 162         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 163         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 164         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
 165         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 166         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 167         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 168         { USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
 169         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 170         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 171         { USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
 172         { USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
 173         { USB_DEVICE(0x0cf3, 0x311F), .driver_info = BTUSB_ATH3012 },
 174         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 175         { USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
 176         { USB_DEVICE(0x0CF3, 0x817b), .driver_info = BTUSB_ATH3012 },
 177         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 178         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 179         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
 180         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 181         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 182         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 183         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 184         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 185         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 186         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 187         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 188         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 189         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 190         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 191
 192         /* Atheros AR5BBU22 with sflash firmware */
 193         { USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },
 194         { USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },
 195
 196         { }     /* Terminating entry */
 197 };
 198
 199 #define USB_REQ_DFU_DNLOAD      1
 200 #define BULK_SIZE               4096
 201 #define FW_HDR_SIZE             20
 202 #define TIMEGAP_USEC_MIN        50
 203 #define TIMEGAP_USEC_MAX        100
 204
 205 static int ath3k_load_firmware(struct usb_device *udev,
 206                                 const struct firmware *firmware)
 207 {
 208         u8 *send_buf;
 209         int err, pipe, len, size, sent = 0;
 210         int count = firmware->size;
 211
 212         BT_DBG("udev %p", udev);
 213
 214         pipe = usb_sndctrlpipe(udev, 0);
 215
 216         send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 217         if (!send_buf) {
 218                 BT_ERR("Can't allocate memory chunk for firmware");
 219                 return -ENOMEM;
 220         }
 221
 222         memcpy(send_buf, firmware->data, 20);
 223         err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
 224                               0, 0, send_buf, 20, USB_CTRL_SET_TIMEOUT);
 225         if (err < 0) {
 226                 BT_ERR("Can't change to loading configuration err");
 227                 goto error;
 228         }
 229         sent += 20;
 230         count -= 20;
 231
 232         pipe = usb_sndbulkpipe(udev, 0x02);
 233
 234         while (count) {
 235                 /* workaround the compatibility issue with xHCI controller*/
 236                 usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
 237
 238                 size = min_t(uint, count, BULK_SIZE);
 239                 memcpy(send_buf, firmware->data + sent, size);
 240
 241                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 242                                         &len, 3000);
 243
 244                 if (err || (len != size)) {
 245                         BT_ERR("Error in firmware loading err = %d,"
 246                                 "len = %d, size = %d", err, len, size);
 247                         goto error;
 248                 }
 249
 250                 sent  += size;
 251                 count -= size;
 252         }
 253
 254 error:
 255         kfree(send_buf);
 256         return err;
 257 }
 258
 259 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 260 {
 261         int ret, pipe = 0;
 262         char *buf;
 263
 264         buf = kmalloc(sizeof(*buf), GFP_KERNEL);
 265         if (!buf)
 266                 return -ENOMEM;
 267
 268         pipe = usb_rcvctrlpipe(udev, 0);
 269         ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 270                               USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 271                               buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);
 272
 273         *state = *buf;
 274         kfree(buf);
 275
 276         return ret;
 277 }
 278
 279 static int ath3k_get_version(struct usb_device *udev,
 280                         struct ath3k_version *version)
 281 {
 282         int ret, pipe = 0;
 283         struct ath3k_version *buf;
 284         const int size = sizeof(*buf);
 285
 286         buf = kmalloc(size, GFP_KERNEL);
 287         if (!buf)
 288                 return -ENOMEM;
 289
 290         pipe = usb_rcvctrlpipe(udev, 0);
 291         ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 292                               USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 293                               buf, size, USB_CTRL_SET_TIMEOUT);
 294
 295         memcpy(version, buf, size);
 296         kfree(buf);
 297
 298         return ret;
 299 }
 300
 301 static int ath3k_load_fwfile(struct usb_device *udev,
 302                 const struct firmware *firmware)
 303 {
 304         u8 *send_buf;
 305         int err, pipe, len, size, count, sent = 0;
 306         int ret;
 307
 308         count = firmware->size;
 309
 310         send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 311         if (!send_buf) {
 312                 BT_ERR("Can't allocate memory chunk for firmware");
 313                 return -ENOMEM;
 314         }
 315
 316         size = min_t(uint, count, FW_HDR_SIZE);
 317         memcpy(send_buf, firmware->data, size);
 318
 319         pipe = usb_sndctrlpipe(udev, 0);
 320         ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 321                         USB_TYPE_VENDOR, 0, 0, send_buf,
 322                         size, USB_CTRL_SET_TIMEOUT);
 323         if (ret < 0) {
 324                 BT_ERR("Can't change to loading configuration err");
 325                 kfree(send_buf);
 326                 return ret;
 327         }
 328
 329         sent += size;
 330         count -= size;
 331
 332         pipe = usb_sndbulkpipe(udev, 0x02);
 333
 334         while (count) {
 335                 /* workaround the compatibility issue with xHCI controller*/
 336                 usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
 337
 338                 size = min_t(uint, count, BULK_SIZE);
 339                 memcpy(send_buf, firmware->data + sent, size);
 340
 341                 err = usb_bulk_msg(udev, pipe, send_buf, size,
 342                                         &len, 3000);
 343                 if (err || (len != size)) {
 344                         BT_ERR("Error in firmware loading err = %d,"
 345                                 "len = %d, size = %d", err, len, size);
 346                         kfree(send_buf);
 347                         return err;
 348                 }
 349                 sent  += size;
 350                 count -= size;
 351         }
 352
 353         kfree(send_buf);
 354         return 0;
 355 }
 356
 357 static int ath3k_switch_pid(struct usb_device *udev)
 358 {
 359         int pipe = 0;
 360
 361         pipe = usb_sndctrlpipe(udev, 0);
 362         return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 363                         USB_TYPE_VENDOR, 0, 0,
 364                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 365 }
 366
 367 static int ath3k_set_normal_mode(struct usb_device *udev)
 368 {
 369         unsigned char fw_state;
 370         int pipe = 0, ret;
 371
 372         ret = ath3k_get_state(udev, &fw_state);
 373         if (ret < 0) {
 374                 BT_ERR("Can't get state to change to normal mode err");
 375                 return ret;
 376         }
 377
 378         if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 379                 BT_DBG("firmware was already in normal mode");
 380                 return 0;
 381         }
 382
 383         pipe = usb_sndctrlpipe(udev, 0);
 384         return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 385                         USB_TYPE_VENDOR, 0, 0,
 386                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 387 }
 388
 389 static int ath3k_load_patch(struct usb_device *udev)
 390 {
 391         unsigned char fw_state;
 392         char filename[ATH3K_NAME_LEN] = {0};
 393         const struct firmware *firmware;
 394         struct ath3k_version fw_version;
 395         __u32 pt_rom_version, pt_build_version;
 396         int ret;
 397
 398         ret = ath3k_get_state(udev, &fw_state);
 399         if (ret < 0) {
 400                 BT_ERR("Can't get state to change to load ram patch err");
 401                 return ret;
 402         }
 403
 404         if (fw_state & ATH3K_PATCH_UPDATE) {
 405                 BT_DBG("Patch was already downloaded");
 406                 return 0;
 407         }
 408
 409         ret = ath3k_get_version(udev, &fw_version);
 410         if (ret < 0) {
 411                 BT_ERR("Can't get version to change to load ram patch err");
 412                 return ret;
 413         }
 414
 415         snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 416                  le32_to_cpu(fw_version.rom_version));
 417
 418         ret = request_firmware(&firmware, filename, &udev->dev);
 419         if (ret < 0) {
 420                 BT_ERR("Patch file not found %s", filename);
 421                 return ret;
 422         }
 423
 424         pt_rom_version = get_unaligned_le32(firmware->data +
 425                                             firmware->size - 8);
 426         pt_build_version = get_unaligned_le32(firmware->data +
 427                                               firmware->size - 4);
 428
 429         if (pt_rom_version != le32_to_cpu(fw_version.rom_version) ||
 430             pt_build_version <= le32_to_cpu(fw_version.build_version)) {
 431                 BT_ERR("Patch file version did not match with firmware");
 432                 release_firmware(firmware);
 433                 return -EINVAL;
 434         }
 435
 436         ret = ath3k_load_fwfile(udev, firmware);
 437         release_firmware(firmware);
 438
 439         return ret;
 440 }
 441
 442 static int ath3k_load_syscfg(struct usb_device *udev)
 443 {
 444         unsigned char fw_state;
 445         char filename[ATH3K_NAME_LEN] = {0};
 446         const struct firmware *firmware;
 447         struct ath3k_version fw_version;
 448         int clk_value, ret;
 449
 450         ret = ath3k_get_state(udev, &fw_state);
 451         if (ret < 0) {
 452                 BT_ERR("Can't get state to change to load configuration err");
 453                 return -EBUSY;
 454         }
 455
 456         ret = ath3k_get_version(udev, &fw_version);
 457         if (ret < 0) {
 458                 BT_ERR("Can't get version to change to load ram patch err");
 459                 return ret;
 460         }
 461
 462         switch (fw_version.ref_clock) {
 463
 464         case ATH3K_XTAL_FREQ_26M:
 465                 clk_value = 26;
 466                 break;
 467         case ATH3K_XTAL_FREQ_40M:
 468                 clk_value = 40;
 469                 break;
 470         case ATH3K_XTAL_FREQ_19P2:
 471                 clk_value = 19;
 472                 break;
 473         default:
 474                 clk_value = 0;
 475                 break;
 476         }
 477
 478         snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 479                 le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");
 480
 481         ret = request_firmware(&firmware, filename, &udev->dev);
 482         if (ret < 0) {
 483                 BT_ERR("Configuration file not found %s", filename);
 484                 return ret;
 485         }
 486
 487         ret = ath3k_load_fwfile(udev, firmware);
 488         release_firmware(firmware);
 489
 490         return ret;
 491 }
 492
 493 static int ath3k_probe(struct usb_interface *intf,
 494                         const struct usb_device_id *id)
 495 {
 496         const struct firmware *firmware;
 497         struct usb_device *udev = interface_to_usbdev(intf);
 498         int ret;
 499
 500         BT_DBG("intf %p id %p", intf, id);
 501
 502         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 503                 return -ENODEV;
 504
 505         /* match device ID in ath3k blacklist table */
 506         if (!id->driver_info) {
 507                 const struct usb_device_id *match;
 508
 509                 match = usb_match_id(intf, ath3k_blist_tbl);
 510                 if (match)
 511                         id = match;
 512         }
 513
 514         /* load patch and sysconfig files for AR3012 */
 515         if (id->driver_info & BTUSB_ATH3012) {
 516
 517                 /* New firmware with patch and sysconfig files already loaded */
 518                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
 519                         return -ENODEV;
 520
 521                 ret = ath3k_load_patch(udev);
 522                 if (ret < 0) {
 523                         BT_ERR("Loading patch file failed");
 524                         return ret;
 525                 }
 526                 ret = ath3k_load_syscfg(udev);
 527                 if (ret < 0) {
 528                         BT_ERR("Loading sysconfig file failed");
 529                         return ret;
 530                 }
 531                 ret = ath3k_set_normal_mode(udev);
 532                 if (ret < 0) {
 533                         BT_ERR("Set normal mode failed");
 534                         return ret;
 535                 }
 536                 ath3k_switch_pid(udev);
 537                 return 0;
 538         }
 539
 540         ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
 541         if (ret < 0) {
 542                 if (ret == -ENOENT)
 543                         BT_ERR("Firmware file \"%s\" not found",
 544                                                         ATH3K_FIRMWARE);
 545                 else
 546                         BT_ERR("Firmware file \"%s\" request failed (err=%d)",
 547                                                         ATH3K_FIRMWARE, ret);
 548                 return ret;
 549         }
 550
 551         ret = ath3k_load_firmware(udev, firmware);
 552         release_firmware(firmware);
 553
 554         return ret;
 555 }
 556
 557 static void ath3k_disconnect(struct usb_interface *intf)
 558 {
 559         BT_DBG("ath3k_disconnect intf %p", intf);
 560 }
 561
 562 static struct usb_driver ath3k_driver = {
 563         .name           = "ath3k",
 564         .probe          = ath3k_probe,
 565         .disconnect     = ath3k_disconnect,
 566         .id_table       = ath3k_table,
 567         .disable_hub_initiated_lpm = 1,
 568 };
 569
 570 module_usb_driver(ath3k_driver);
 571
 572 MODULE_AUTHOR("Atheros Communications");
 573 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 574 MODULE_VERSION(VERSION);
 575 MODULE_LICENSE("GPL");
 576 MODULE_FIRMWARE(ATH3K_FIRMWARE);